package com.liran.config;

import org.springframework.stereotype.Component;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @author: whh
 * @Date: 2022/7/10
 * @Description:
 */

@Component
public class CORSFilter implements Filter {

   @Override
   public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
           throws IOException, ServletException {
       HttpServletResponse res = (HttpServletResponse) response;
       res.addHeader("Access-Control-Allow-Credentials", "true");
       res.addHeader("Access-Control-Allow-Origin", "*");
       res.addHeader("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT");
       res.addHeader("Access-Control-Allow-Headers", "Content-Type,X-CAF-Authorization-Token,sessionToken,X-TOKEN");
       if (((HttpServletRequest) request).getMethod().equals("OPTIONS")) {
           response.getWriter().println("ok");
           return;
       }
       chain.doFilter(request, response);
   }
   @Override
   public void destroy() {
   }
   @Override
   public void init(FilterConfig filterConfig) throws ServletException {
   }
}
